Elixir Strings are brought to you by W.L. Gore and Associates, an innovator in PTFE polymer since 1958 (think Teflon). If you're a skier and a hiker like me, you've probably used Gore-Tex clothing for years. Now, they turn this expertise to making polymer coatings for their Elixir guitar strings, and the results are striking. You don't have to spend long in any guitar-related discussion before someone eventually begins praising the long-lasting tone of these popular strings. It's this long-lasting tone that has led many major guitar manufacturers to ship their guitars already strung with Elixir strings.